Select the cells containing the decimal points you want to line up. Hold "Shift" and click to selects adjacent cells, or hold "Ctrl" and click to select non-adjacent cells. Note the maximum number ...

When poring over some of Bianchini’s work, Van Brummelen came across the number 10.4, written with the decimal point and an explanation of how to multiply the number by 8.

NPR's Scott Simon talks to math historian Glen Van Brummelen about his finding that the decimal point appeared in the 1440s, earlier than thought.

The decimal point was invented around 150 years earlier than previously thought, according to an analysis of astronomical tables compiled by the Italian merchant and mathematician Giovanni ...